Proton and zinc(II) complexes of 2-(polyhydroxyalkyl)thiazolidine-4-carboxylic acid derivatives
作者:Tam�s Gajda、L�szl� Nagy、K�lm�n Burger
DOI:10.1039/dt9900003155
日期:——
The protonation and zinc-ion co-ordination equilibria of 2-(polyhydroxyalkyl) thiazolidine-4-carboxylicacidderivatives have been studied by potentiometric titration in the range pH 1.5–8. In most cases the formation of complexes with a metal-to-ligand ratio of 1 : 2 was demonstrated, but at above pH 6 mixed-ligand complexes involving hydroxide-ion co-ordination were also observed. The protonation
The present invention provides compositions comprising sugar, cysteine, and/or sugar-cysteine products, methods of preparing the same, and/or using the same.